tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1* STMicroelectronics SAS. ST NCI NFC Controller
2
3Required properties:
4- compatible: Should be "st,st21nfcb-spi"
5- spi-max-frequency: Maximum SPI frequency (<= 4000000).
6- interrupts: GPIO interrupt to which the chip is connected
7- reset-gpios: Output GPIO pin used to reset the ST21NFCB
8
9Optional SoC Specific Properties:
10- pinctrl-names: Contains only one value - "default".
11- pintctrl-0: Specifies the pin control groups used for this controller.
12- ese-present: Specifies that an ese is physically connected to the nfc
13controller.
14- uicc-present: Specifies that the uicc swp signal can be physically
15connected to the nfc controller.
16
17Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):
18
19&mcspi4 {
20
21
22 st21nfcb: st21nfcb@0 {
23
24 compatible = "st,st21nfcb-spi";
25
26 clock-frequency = <4000000>;
27
28 interrupt-parent = <&gpio5>;
29 interrupts = <2 IRQ_TYPE_EDGE_RISING>;
30
31 reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
32
33 ese-present;
34 uicc-present;
35 };
36};